One of the most popular mobile apps for kids is one most parents haven't heard anything about.
Ask.fm allows users to pose questions to other users anonymously.
It's become a "secret playground" for teens and pre-teens that have left Facebook because their parents follow them.
Many of the questions posed are sexual in nature.
Bullying is also rampant on the site, which has been linked to several teen suicides, most recently a 12-year-old girl in the United Kingdom.
Ask.fm currently has more than 60 million users and is adding hundreds of thousands new members everyday.
Dr. Nicole Kendall teaches in the education department at Tennessee State University. She has looked at Ask.fm and how it is being used by teens.
"They have a chat room where they can hang out but not leave a social trail," she explained. "I can be the mean girl in the bathroom stall and nobody knows it's me."
Ask.fm is based in Latvia and the developers of the site have promised to increase monitoring how it is being used, but no changes have been made so far.